<article class="office">

  <!--有图片则展示图片-->
  <div class="office-content" *ngIf="fileItem">
    <!--https://view.officeapps.live.com/op/view.aspx?src=http://storage.xuetangx.com/public_assets/xuetangx/PDF/1.xls-->
    <iframe [src]="officeUrl"
            width='100%' height='100%' frameborder='1'>
    </iframe>
  </div>

</article>
